Siliconpr0n.org actually has a decapped (but not delayered) unrevised RP2A03, and quite a few differences have been identified, most notably the lack of looped noise (which is because the circuitry wasn't even there at all) and a bunch of disconnected mystery logic at the top-right corner of the chip (where the G revision has its giant test pattern).

_________________Quietust, QMT Productions
P.S. If you don't get this note, let me know and I'll write you another.

It seems to be buggy; the data bus drivers's logic seems to be inverted from what it should be. Makes it hard to figure out what's going on... (Node 42 is "do not drive NES-internal data bus", but it's low (true/drivers enabled) whenever R/W=write or φ2=0. ... which is the wrong sense for the structure that exists.

Is there a convention for naming nodes? Especially in the cases of- A = not B = not not C?- D = not E and F = not E?

> So, i missed only NES PAL CPU (RP2A07), because don't have it.I have a RP2A07 (and RP2C07-0) that you can get. Just PM me an address where to send it if you want (The pins are cut so I don't have much use for them anyway)

> The various chip scans done by Visual6502 seem pretty clean, and as I understand they were mostly "stitched automatically by Christian Sattler in the UK, using Autopano-sift-C and custom code".I can forward an email to Christian if you want help with some stitching. I can't promise that he'll respond though

Btw, if anyone wants to run some tests on a square button famicom (to verify some behavior or whatever) I have one here with pcb revision 3 and revision less cpu & ppu.

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